What is the length of the arc on a circle with radius 16 ft intercepted by a 60â° angle? use 3.14 for ï€ . round the answer to the hundredths place. enter your answer in the box. what is the measure of the central angle of a circle with radius 24 ft that intercepts a 10 ft arc? use 3.14 for ï€ . round the answer to the hundredths place. enter your answer in the box. â° which radian measure is equivalent to −15â° ? −ï€/12 −20ï€/9 −9ï€/20 −12ï€ an angle in standard position measures 5ï€/8 radians. in which quadrant does the terminal side of this angle lie? quadrant i quadrant ii quadrant iii quadrant iv which angles are coterminal with 7ï€/8 ? select each correct answer. −25ï€/8 −9ï€/8 23ï€/8 9ï€/8